/* Scroll to Top Button Styles */
#scrollToTopBtn {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 54px;
  height: 54px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border: none;
  border-radius: 50%;
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.6);
  cursor: pointer;
  opacity: 1 !important;
  visibility: visible !important;
  transition: opacity 0.4s ease, visibility 0.4s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
}

#scrollToTopBtn .liquid-fill {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

#scrollToTopBtn .liquid-svg {
  width: 100%;
  height: 100%;
  display: block;
}

#scrollToTopBtn .liquid-arrow {
  position: relative;
  z-index: 2;
  color: #fff;
  width: 24px;
  height: 24px;
  transition: transform 0.3s;
}

#scrollToTopBtn:hover .liquid-arrow {
  transform: translateY(-5px) scale(1.08);
}

#scrollToTopBtn.show {
  opacity: 1;
  visibility: visible;
}

/* Optional: subtle border for contrast */
#scrollToTopBtn {
  border: 2px solid #fff3;
}